Calculate the total force on the earth due to venus, jupiter, and saturn, assuming all four planets are in a line. the masses are mv=0.815me, mj=318me, msat=95.1me, msun=1.99x10^30kg, me=5.98x10^24kg and the mean distances of the four planets from the sun are 108, 150, 778, and 1430 million km. apparently the answer is 9.56x10^17 n but i'm not sure how to get to that

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?

Acyclotron is used to produce a beam of high-energy deuterons that then collide with a target to produce radioactive isotopes for a medical procedure. deuterons are nuclei of deuterium, an isotope of hydrogen, consisting of one neutron and one proton, with total mass 3.34×10−27kg. the deuterons exit the cyclotron with a kinetic energy of 6.40 mev .a-what is the speed of the deuterons when they exit? b-if the magnetic field inside the cyclotron is 1.25 t, what is the diameter of the deuterons' largest orbit, just before they exit? c-if the beam current is 350 μa how many deuterons strike the target each second?

What are the effects of pressure on liquids?